I finally got DVI/HDMI working on HDMI3 input channel by first hooking the video card to a regular VGA monitor, uninstalling and reinstalling ATI drivers.
Then I got both monitors going (VGA + Samsung), and then swapping the primary monitor to the Samsung.
After that, disconnected the VGA monitor, and rebooted without it.
Then started upping the resolution, and got to 1920x1080p @ 60Hz.
Using powerstrip, I made a custom resolution so there is no overscan. Looks good in Movie2 mode.
I'm currently doing a few spectraphotometer runs for color, greyscale tracking and gamma evaluations, in preparation for a "go" at a service menu calibration guide (I've heard there are some problems with the HL-T SM calibration, and I may wish for the uber-tweakable HL-S SM after trying this...)
My Preliminary Data from the spectraphotometer (Spyder2 probe) for Movie 2 setting defaults in the user video menu:
Best Gamma: -3 is so far the best gamma setting vs. default 0, but still need to test -2, -1, +1, +2, +3, but they all look worse (flattest curve to ideal 2.2)
Best My White Balance: -10 (least Delta E, and closest to 6500K, at 7230K)
This is going to take a long time to sort out with tweaks. Once I get into the Service Menu, I will see if the default Dynamic Setting is alterable and "sticks"...
This is slow going, but a pleasurable way to spend the New Year's Day for me.
Edit: I just finished my first round of Service Menu calibration, and had to re-learn the menu structure and what everything does vs. my old HL-S6188 set.
So, after about 4 hours of experimenting and tweaking:
Very nice D65 whites, good greyscale tracking, and near spot-on color!
Tools: Spyder2 probe, HCFR freeware, XBOX HD-DVD player 1080i over component, DVE-HD disc
Using the Service Menu, I "re-calibrate" the default "Dynamic/Cool1/Wide colorspace" settings to be correct, so I won't have to futz with the user menu to get everything looking good again.
Now, I just have to calibrate DVD 480i, PC inputs with GetGray calibration DVD, and copy the values over to the TV settings (SD and HD)
See calibration diagrams below (3rd and 4th images)
Now, need to tweak the Gamma... why is the Gamma setting greyed out and set to the crummy OEM(4) gamma??????? Will a firmware update solve that?